{#
 Licensed to the Apache Software Foundation (ASF) under one
 or more contributor license agreements.  See the NOTICE file
 distributed with this work for additional information
 regarding copyright ownership.  The ASF licenses this file
 to you under the Apache License, Version 2.0 (the
 "License"); you may not use this file except in compliance
 with the License.  You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing,
 software distributed under the License is distributed on an
 "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 KIND, either express or implied.  See the License for the
 specific language governing permissions and limitations
 under the License.
#}

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Airflow 404 = lots of circles</title>
  <link rel="icon" type="image/png" href="{{ url_for('static', filename='pin_32.png') }}">
</head>

<body>
    <div style="font-family: verdana;">
        <h1>Airflow 404 = lots of circles</h1>
        <p>{{ hostname }}</p>
    </div>
    <div id="div_svg"
         class="centered text-center"
         style="border: 1px solid #ccc;padding:0;margin:0;">
        <svg id="circles-svg"></svg>

    </div>
    <script src="{{ url_for_asset('d3.min.js') }}"></script>
    <script>
    var height =700;
    var width = document.getElementById("div_svg").offsetWidth;
    var points = 20;
    var matrix = [];
    var duration = 2000;
    var i = 0;
    var flip = 0;
    var colors = [
        "#FF5A5F", "#007A87", "#7B0051", "#00D1C1", "#8CE071", "#FFB400",
        "#FFAA91", "#B4A76C", "#9CA299", "#565A5C"
    ];


    function choose(choices) {
        var index = Math.floor(Math.random() * choices.length);
        return choices[index];
    }
    // Making a matrix
    for(var x=0; x<points; x++) {
        for(var y=0; y<points; y++) {
            matrix[i] = {
                'x': x,
                'y': y,
            }
            i += 1;
        }
    }
    sclx = d3.scale.linear().domain([-1, points]).range([0, width]);
    scly = d3.scale.linear().domain([-1, points]).range([0, height]);

    circles = d3.select("#circles-svg")
    .attr('width', "100%")

    .attr('height', height)
    .selectAll("circle").data(matrix).enter()
    .append("circle")
    .attr("stroke", 'black')
    .attr("fill", 'none')
    .attr("cx", function(d, i) {return sclx(d.x)})
    .attr("cy", function(d, i) {return scly(d.y)})
    .attr("r", function(d, i) {return 0});



    function toggle(){
        var size = 50 + (200* Math.random());
        var y_delay = 0;
        var random_delay = 0;
        if(Math.random() > 0.7){
            y_delay = 50+ (Math.random() * 50);
        }
        var x_delay = 0;
        if(Math.random() > 0.7){
            x_delay = 50+ (Math.random() * 50);
        }
        if(Math.random() > 0.7){
            random_delay = 1;
        }

        var random_x = Math.random() * width;
        var random_y = Math.random() * height;
        if(Math.random() > 0.5){
            col = choose(colors);
        } else {
            col = "black";
        }
        if(Math.random() > 0.8){
            col = function() {return choose(colors)};
        }



        if (flip==0){

            flip = 1;

            circles.transition()
            .duration(duration)
            .attr("cx", function(d, i) {return sclx(d.x)})
            .attr("cy", function(d, i) {return scly(d.y)})
            .attr("stroke", col)
            .delay(function(d, i) {return (random_delay * Math.random() * 1000) + (d.x*x_delay) + (d.y * y_delay)})
            .attr("r", function(d, i) {return size});
        }
        else{
            flip = 0;

            if(Math.random() > 0.6){
                circles.transition()
                .duration(duration)
                .attr("r", function(d, i) {return 0})
                .attr("cx", function(d, i) {return random_x})
                .attr("stroke", col)
                .delay(function(d, i) {return (i/2) *  Math.random() * 5})
                .attr("cy", function(d, i) {return random_y});
            }
            else{
                circles.transition()
                .duration(duration)
                .attr("cx", function(d, i) {return sclx(d.x)})
                .attr("cy", function(d, i) {return scly(d.y)})
                .attr("stroke", col)
                .delay(function(d, i) {return (random_delay * Math.random() * 1000) + (d.x*x_delay) + (d.y * y_delay)})
                .attr("r", function(d, i) {return 0});
            }
        }

    }

    setInterval(toggle, duration*3);
    toggle();

    </script>
</body>
</html>
